JPH0434533Y2 - - Google Patents
Info
- Publication number
- JPH0434533Y2 JPH0434533Y2 JP3932785U JP3932785U JPH0434533Y2 JP H0434533 Y2 JPH0434533 Y2 JP H0434533Y2 JP 3932785 U JP3932785 U JP 3932785U JP 3932785 U JP3932785 U JP 3932785U JP H0434533 Y2 JPH0434533 Y2 JP H0434533Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat fixing
- copying machine
- roller
- gear
- upper cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、静電写真複写機の着脱式熱定着装
置、詳しくは、静電写真複写機本体への装着状態
においてその複写機本体側の定位置駆動回転ギア
の下方に位置してその駆動回転ギアにより回転さ
せられる従動回転ギアを長手方向一端側に備えた
熱定着用の上部ローラを上部カバーに架設し、当
該上部カバーを熱定着用の下部ローラが架設され
ている下部カバーに、それらの前後方向一端側に
配置された前記上・下部ローラと平行な枢支軸周
りで揺動開閉自在に枢着すると共に、前記上部カ
バーを閉じ姿勢とした状態において前記上・下部
カバー間に設けたスプリングの付勢力で前記熱定
着用上・下部ローラ同士を互いに圧接させ、それ
ら上・下部ローラの熱膨張を前記上部カバーの前
記スプリングの付勢力に抗しての上方への変位に
より吸収するように構成してある静電写真複写機
の着脱式熱定着装置の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a removable heat fixing device for an electrostatographic copying machine, and more specifically, a removable heat fixing device for an electrostatographic copying machine. An upper roller for heat fixing, which has a driven rotary gear located below the fixed position drive rotary gear and rotated by the drive rotary gear on one longitudinal end side, is installed on the upper cover, and the upper cover is used for heat fixing. The lower roller is pivotally connected to the lower cover on which the lower roller is constructed so as to be able to swing open and close around a pivot axis parallel to the upper and lower rollers arranged at one end in the front and back direction, and the upper cover is closed. In this state, the upper and lower thermal fixing rollers are brought into pressure contact with each other by the biasing force of the spring provided between the upper and lower covers, and the thermal expansion of the upper and lower rollers is absorbed by the spring of the upper cover. This invention relates to an improvement in a removable heat fixing device for an electrostatographic copying machine that is configured to absorb forces by upward displacement.
従来この種の静電写真複写機の着脱式熱定着装
置においては、第９図に示すように、その着脱式
熱定着装置を静電写真複写機本体へ挿入装着した
状態において、その複写機本体側の定位置に設け
られている駆動回転ギアａの最下部分に対して、
その着脱式熱定着装置の揺動開閉自在な上部カバ
ーｂに架設されている熱定着用の上部ローラｃの
長手方向一端側に設けられた従動回転ギアｄが直
接咬合するように構成されていた。
Conventionally, in the removable heat fixing device of this type of electrostatographic copying machine, as shown in FIG. With respect to the lowest part of the drive rotation gear a provided at a fixed position on the side,
A driven rotary gear d provided at one end in the longitudinal direction of an upper roller c for heat fixing, which is installed on the upper cover b of the removable heat fixing device and can be opened and closed freely, is configured to directly engage with the upper cover b. .
しかしながら、上記従来構成の静電写真複写機
の着脱式熱定着装置では、次のような問題があつ
た。
However, the detachable heat fixing device of the electrostatographic copying machine having the above-mentioned conventional structure has the following problems.
即ち、熱定着作用開始に伴つて加熱される前記
上部ローラｃおよび下部ローラｅの熱膨張によつ
て、前記上部カバーｂひいては上部ローラｃおよ
び従動回転ギアｄが、位置固定状態にある下部カ
バーｆから、それら上・下部カバーｄ，ｆ同士の
枢支軸ｇを中心として、図中白抜き矢印ｘで示す
ように、ある程度上方に揺動変位することとなる
ため、前記上・下部ローラｃ，ｅが加熱されてい
ない状態（非コピー状態や非スタンバイ状態）に
おいて、前記駆動回転ギアａと従動回転ギアｄと
の間に前記熱膨張による変位量に相当する余裕が
ある状態に、それら両ギアａ，ｄ同士を咬合させ
ておく必要がある。そうしなければ、前記上・下
部ローラｃ，ｅが加熱されて熱膨張し、前記上部
カバーｂひいては従動回転ギアｄが上昇変位する
状態（コピー状態やスタンバイ状態）において
は、前記両ギアａ，ｄ同士の咬合が極度にタイト
になつて回転負荷が以上に増大したり、あるい
は、その着脱式熱定着装置を一旦複写機本体から
取り外すと、その後再度装着しようとしても、前
記両ギアａ，ｄ同士がスムーズに咬合しないため
に装着できない、といつた不都合が生じてしま
う。 That is, due to the thermal expansion of the upper roller c and the lower roller e that are heated with the start of the heat fixing action, the upper cover b, as well as the upper roller c and the driven rotating gear d, are fixed in position. Therefore, the upper and lower rollers c, In a state where e is not heated (non-copy state or non-standby state), the driving rotary gear a and the driven rotary gear d have a margin corresponding to the amount of displacement due to the thermal expansion. It is necessary to keep a and d in occlusion. Otherwise, in a state where the upper and lower rollers c and e are heated and thermally expanded, and the upper cover b and thus the driven rotary gear d are displaced upward (copy state or standby state), both the gears a, If the occlusion between the gears a and d becomes extremely tight and the rotational load increases, or if the removable heat fixing device is removed from the copying machine body and then attempted to be reinstalled, both the gears a and d This results in the inconvenience that they cannot be installed because they do not interlock smoothly.
そこで、従来は、複写機本体への前記駆動回転
ギアａの組み付けに際して、複写機本体に装着し
た熱定着装置の前記上・下部ローラｃ，ｅを予め
所定の温度に加熱した状態で前記駆動回転ギアａ
の位置調整を行う、という手段を採用せざるを得
ず、従つて、組立作業に非常に手間がかかつて能
率が悪くなると共に高温のため作業がし難いとい
う欠点があつた。 Therefore, conventionally, when assembling the driving rotation gear a to the copying machine main body, the driving rotation gear is heated with the upper and lower rollers c and e of the heat fixing device mounted on the copying machine main body heated to a predetermined temperature in advance. gear a
Therefore, there were disadvantages in that the assembly work was very time-consuming and inefficient, and the work was difficult due to the high temperature.
本考案は、かかる従来実情に鑑みてなされたも
のであつて、その目的は、着脱式熱定着装置側に
比較的簡素な構造改良を施すのみで、複写機本体
への前記駆動回転ギアの組み付けに際して、従来
のような面倒な格別の調整を行なう必要を無くし
ながら、着脱式熱定着装置の熱定着用上・下部ロ
ーラを常に円滑な回転駆動状態に維持できると共
に、その定着装置の複写機本体への着脱も支障無
くスムーズに行えるようにせんとすることにあ
る。 The present invention has been developed in view of the conventional situation, and its purpose is to simply make a relatively simple structural improvement to the removable heat fixing device, and to improve the assembly of the drive rotation gear to the main body of the copying machine. In this case, it is possible to maintain the upper and lower heat fixing rollers of the removable heat fixing device in a smooth rotational state at all times, without the need for the troublesome and special adjustments that are conventionally required. The aim is to allow for smooth attachment and detachment without any hindrance.
上記目的を達成するために、本考案は、冒頭に
記載したような基本的構成を有する静電写真複写
機の着脱式熱定着装置において、前記静電写真複
写機本体側の定位置駆動回転ギアの回転を前記熱
定着用上部ローラが備えている従動回転ギアに間
接的に伝達するための中間ギアを、その回転中心
が前記複写機本体側の定位置駆動回転ギアの回転
中心と前記上・下部カバーの枢支軸の軸心とを結
ぶ線上またはその付近に位置する状態に、前記上
部カバーに支承させて設けてある、という手段を
採用した点に特徴がある。
In order to achieve the above object, the present invention provides a removable heat fixing device for an electrostatographic copying machine having the basic configuration as described at the beginning, in which a fixed position driving rotary gear is provided on the main body side of the electrostatographic copying machine. An intermediate gear for indirectly transmitting the rotation of the upper roller to the driven rotating gear provided in the upper roller for heat fixing is arranged such that the center of rotation thereof is the center of rotation of the fixed position drive rotating gear on the side of the main body of the copying machine and the upper roller. It is characterized in that it is supported by the upper cover and positioned on or near a line connecting the axis of the pivot shaft of the lower cover.
かかる特徴構成により発揮される作用は次の通
りである。
The effects achieved by this characteristic configuration are as follows.
即ち、本考案に係る静電写真複写機の着脱式熱
定着装置によれば、第１図に模式的に例示するよ
うに、静電写真複写機本体側の定位置に設けられ
た駆動回転ギアGAと、着脱式熱定着装置の複写
機本体側への装着状態においてその駆動回転ギア
GAの下方に位置する熱定着用上部ローラが備え
ている従動回転ギアGPとを、前記複写機本体側
の定位置駆動回転ギアの回転中心PAと上・下部
カバーの枢支軸の軸心Ｐとを結ぶ線Ｌ上またはそ
の付近に回転中心PMを有する中間ギアGMを介し
て間接的に連動連結させる構成としてあるから、
熱定着作用開始に伴つて加熱される上・下部ロー
ラの熱膨張によつて上部カバーが上方へ揺動移動
しても、前記駆動回転ギアGAと直接咬合してい
る前記中間ギアGMの変位方向は、図中白抜き矢
印Ｘで示すように、前記駆動回転ギアGAのほぼ
接線方向と等しくなるため、それら駆動回転ギア
GAと中間ギアGMとの咬合状態は殆ど変化せずタ
イトになることは無い。一方、前記従動回転ギア
GPについてみれば、これも前記中間ギアGMと同
様に図中白抜き矢印X′で示す方向に変位するが、
この従動回転ギアGPは前記駆動回転ギアGAとは
咬合していないから、その変位による駆動回転ギ
アGAに対する影響は無く、また、その変位方向
X′と前記中間ギアGMの変位方向Ｘとは軸心Ｐを
中心とした回転方向においてそれら両者の変位量
は等しいから、それら従動回転ギアGPと中間ギ
アGMとの咬合状態も殆ど変化せずタイトになる
ことは無い。つまり、上記上・下部ローラの熱膨
張によつて上部カバーが上方へ揺動移動しても、
前記三つのギアGA，GM，GP同士の咬合状態は殆
ど変化しない訳である。従つて、組み付け時にお
いて、前記三つのギアGA，GM，GP同士を、格別
な調整を行わずに、通常の設定状態でセツトして
おくという簡易な手段を採用しても、前記上・下
部ローラの加熱による熱膨張に起因して前記上部
カバーひいては中間ギアGMおよび従動回転ギア
GPが上昇変位する状態（コピー状態やスタンバ
イ状態）において、ギア同士の咬合が極度にタイ
トになつて回転負荷が異常に増大したり、あるい
は、その着脱式熱定着装置を一旦複写機本体から
取り外してからその後再度装着しようとしたとき
スムーズに装着できない、といつた従来問題は発
生しないのである。 That is, according to the removable heat fixing device for an electrostatographic copying machine according to the present invention, as schematically illustrated in FIG. G A and its driving rotation gear when the removable heat fixing device is attached to the copying machine main body.
The driven rotary gear G P of the upper heat fixing roller located below G A is connected to the rotation center P A of the fixed position driving rotary gear on the copying machine main body side and the pivot shaft of the upper and lower covers. Since the structure is such that the intermediate gear G M has the rotation center P M on or near the line L connecting the shaft center P, the intermediate gear G M is indirectly coupled to the shaft center P.
Even if the upper cover swings upward due to the thermal expansion of the upper and lower rollers that are heated with the start of the heat fixing action, the intermediate gear G M that is directly engaged with the drive rotation gear G A As shown by the white arrow X in the figure, the direction of displacement is approximately equal to the tangential direction of the drive rotating gear G
The occlusal state between G A and intermediate gear G M hardly changes and does not become tighter. On the other hand, the driven rotating gear
Looking at G P , it is also displaced in the direction shown by the white arrow X' in the figure, similar to the intermediate gear G M , but
Since this driven rotary gear G P is not in mesh with the drive rotary gear G A , its displacement has no effect on the drive rotary gear G A , and the displacement direction
Since the amount of displacement between X' and the displacement direction X of the intermediate gear G M is equal in the direction of rotation about the axis P, the meshing state of the driven rotating gear G P and the intermediate gear G M is almost the same. It will not change and become tighter. In other words, even if the upper cover swings upward due to the thermal expansion of the upper and lower rollers,
This means that the occlusal state of the three gears G A , GM , and GP hardly changes. Therefore, even if a simple method of setting the three gears G A , G M , and G P in their normal settings without making any special adjustments is adopted during assembly, the above-mentioned Due to thermal expansion due to heating of the upper and lower rollers, the upper cover and eventually the intermediate gear GM and the driven rotating gear
In the state where G P is displaced upward (copy state or standby state), the engagement between the gears becomes extremely tight and the rotational load increases abnormally, or the removable heat fixing device is removed from the copying machine body. The conventional problem of not being able to put it on smoothly when trying to put it on again after removing it does not occur.
以下、本考案による静電写真複写機の着脱式熱
定着装置を適用した静電写真複写機の具体的実施
例を図面（第２図ないし第８図）に基いて説明す
る。
Hereinafter, a specific embodiment of an electrostatographic copying machine to which a removable heat fixing device for an electrostatographic copying machine according to the present invention is applied will be described with reference to the drawings (FIGS. 2 to 8).
第２図イ，ロに示すように、静電写真複写機の
本体１に対して、感光ドラム、帯電装置、現像装
置、クリーニング装置（図示せず）等を一体的な
ユニツトに構成した着脱式作像ユニツトＢと、本
考案に係る第３図ないし第８図に示すような着脱
式熱定着装置Ａが組み込まれており、前記作像ユ
ニツトＢの下方にある転写装置によりトナー像を
転写された複写紙を前記熱定着装置Ａに導入し
て、その熱定着用の上部ローラ２と下部ローラ３
との間を通過させることにより、それら上・下部
ローラ２，３で複写紙を加圧しながら加熱して前
記トナー像を複写紙に定着し、その定着後の複写
紙は上下一対の非紙用ローラ４，５間を通過させ
て複写機本体１の外部へ排出するように構成して
ある。なお、第２図ロにおいて、GAは、後で詳
述するように、前記熱定着装置Ａ側の熱定着用上
部ローラ２や非紙用ローラ４等を回転駆動させる
ための駆動回転ギアであつて、複写機本体１側の
定位置に位置変更不能に設けられているものであ
る。また、前記熱定着用上・下部ローラ２，３
は、第４図に示すように、加熱用ランプ２ａ，３
ａを内蔵したアルミ製のローラ本体２ｂ，３ｂと
その外周面を被覆するシリコンゴム２ｃ，３ｃと
によつて構成されている。 As shown in Figures 2A and 2B, a removable device is installed in the main body 1 of the electrostatographic copying machine in which a photosensitive drum, a charging device, a developing device, a cleaning device (not shown), etc. are integrated into an integrated unit. An image forming unit B and a removable heat fixing device A according to the present invention as shown in FIGS. 3 to 8 are incorporated, and a toner image is transferred by a transfer device located below the image forming unit B. The copied paper is introduced into the heat fixing device A, and the upper roller 2 and lower roller 3 for heat fixing are introduced into the heat fixing device A.
By passing the toner image between the upper and lower rollers 2 and 3, the copy paper is heated while being pressed, and the toner image is fixed on the copy paper. After the fixation, the copy paper is transferred to a pair of upper and lower non-paper It is configured so that it passes between rollers 4 and 5 and is discharged to the outside of the copying machine main body 1. In FIG. 2B, G A is a drive rotation gear for rotationally driving the upper heat fixing roller 2, non-paper roller 4, etc. on the heat fixing device A side, as will be described in detail later. It is provided in a fixed position on the side of the main body 1 of the copying machine so that its position cannot be changed. In addition, the upper and lower rollers 2 and 3 for heat fixing
As shown in FIG. 4, the heating lamps 2a, 3
The roller body 2b, 3b is made of aluminum and has a built-in roller body, and silicone rubber 2c, 3c covers the outer peripheral surface of the roller body 2b, 3b.
前記熱定着装置Ａは、複写機本体１に対して、
前記上・下部ローラ２，３の軸心方向に挿抜可能
なユニツト式に構成されたものであつて、第３図
ないし第５図に示すように、複写機本体１への装
着状態において、その複写機本体１側の前記定位
置駆動回転ギアGAの下方に位置してその駆動回
転ギアGAにより回転させられる従動回転ギアGP
を長手方向一端側（第３図において右側相当部）
に備えた前記熱定着用上部ローラ２および非紙用
ローラ４等が架設された上部カバー６と、前記熱
定着用下部ローラ３および非紙用ローラ５が架設
された下部カバー７とを有している。そして、そ
の上部カバー６は、下部カバー７に対して、それ
らの前後方向一端側に配置された前記上・下部ロ
ーラ２，３と平行な枢支軸８周りで揺動開閉自在
に枢着されている。なお、その枢支軸８は、下方
の非紙用ローラ５の回転軸を兼ねているものであ
る。 The heat fixing device A has the following functions for the copying machine main body 1:
It is constructed as a unit that can be inserted and removed in the axial direction of the upper and lower rollers 2 and 3, and as shown in FIGS. 3 to 5, when it is installed in the copying machine body 1, A driven rotary gear G P located below the fixed position drive rotary gear G A on the copying machine main body 1 side and rotated by the drive rotary gear G A.
on one end in the longitudinal direction (corresponding to the right side in Figure 3)
It has an upper cover 6 on which the upper heat fixing roller 2 and non-paper roller 4 are installed, and a lower cover 7 on which the lower heat fixing roller 3 and non-paper roller 5 are installed. ing. The upper cover 6 is pivotally connected to the lower cover 7 around a pivot shaft 8 parallel to the upper and lower rollers 2 and 3 arranged at one end in the front-rear direction. ing. The pivot shaft 8 also serves as the rotation shaft of the lower non-paper roller 5.
また、以下に詳述するように、前記上部カバー
６を閉じ姿勢とした状態において、その上部カバ
ー６を前記下部カバー７に対して閉じ方向に付勢
するように構成することにより、その上部カバー
６の閉じ姿勢において前記熱定着用上・下部ロー
ラ２，３同士を互いに圧接させると共に、それら
上・下部ローラ２，３の熱膨張を前記上部カバー
６の前記付勢力に抗しての上方への変位により吸
収するようにしてある。 Further, as will be described in detail below, when the upper cover 6 is in the closed position, the upper cover 6 is configured to be biased toward the lower cover 7 in the closing direction. 6, the upper and lower heat fixing rollers 2 and 3 are brought into pressure contact with each other, and the thermal expansion of the upper and lower rollers 2 and 3 is directed upward against the urging force of the upper cover 6. It is designed to be absorbed by the displacement of .
即ち、前記下部カバー７の前後方向他端側に
は、左右の側板部分７ａ，７ａに対して、一対の
アーム９，９が、前記枢支軸８と平行で、かつ、
互いに同心状に配置された支軸１０，１０の周り
で揺動自在に枢着されている。この支軸１０とし
ては、第６図および第７図に示すように、前記側
板部分７ａに取り付けた段付きボルトを用いてい
る。そして、この段付きボルトの段部１０ａでア
ーム９を支持させ、また、その頭部１０ｂとスペ
ーサー１２とによつてアーム９のボルト軸心方向
での位置を規定してある。また、前記両アーム
９，９間には、一本の横軸１３が、各アーム９の
自由端側に形成した長孔９ａの範囲内でアーム長
手方向へ遊動可能な状態に架設されている。そし
て、前記横軸１３の両端部とそれに対応するアー
ム９，９との間には、夫々、引張スプリング１
５，１５が、付勢力調整具１６，１６を介して設
けられており、前記横軸１３を前記支軸１０側へ
付勢している。図示の各付勢力調整具１６は、ス
プリング１５の一端にねじ軸１６ａを係着し、こ
のねじ軸１６ａをアーム９に設けたブラケツト１
６ｂの孔１６ｃに挿通し、前記ねじ軸１６ａの突
出端側にナツト体１６ｄを螺着し、ナツト体１６
ｄの回転操作によつて、スプリング１５の付勢力
を調整するように構成したものである。 That is, on the other end side of the lower cover 7 in the front-back direction, a pair of arms 9, 9 are parallel to the pivot shaft 8, and are parallel to the left and right side plate parts 7a, 7a.
They are pivotably mounted around support shafts 10, 10 that are arranged concentrically with each other. As this support shaft 10, as shown in FIGS. 6 and 7, a stepped bolt attached to the side plate portion 7a is used. The arm 9 is supported by the stepped portion 10a of the stepped bolt, and the position of the arm 9 in the bolt axial direction is defined by the head 10b and the spacer 12. Further, a horizontal shaft 13 is installed between the two arms 9 so as to be movable in the longitudinal direction of the arm within the range of a long hole 9a formed at the free end side of each arm 9. . A tension spring 1 is provided between both ends of the horizontal shaft 13 and the corresponding arms 9, 9, respectively.
5 and 15 are provided via biasing force adjusters 16 and 16, and bias the horizontal shaft 13 toward the support shaft 10 side. Each biasing force adjuster 16 shown in the figure has a screw shaft 16a engaged with one end of a spring 15, and a bracket 1 with this screw shaft 16a provided on the arm 9.
6b, and screw the nut body 16d onto the protruding end side of the screw shaft 16a.
The biasing force of the spring 15 is adjusted by the rotation operation d.
一方、前記上部カバー６の左右側板部分６ａ，
６ａには、前記支軸１０，１０の上方位置に凹所
１７，１７が形成されており、それら凹所１７，
１７に前記横軸１３を落とし込むことにより、前
記上・下部カバー６，７を第５図に実線で示す閉
じ姿勢に連結すると共に、その状態において前記
熱定着用上・下部ローラ２，３同士を互いに圧接
させ、かつ、それら上・下部ローラ２，３の熱膨
張を、前記スプリング１５，１５の付勢力に抗し
ての前記上部カバー６の上方への変位により吸収
できるように構成されている。また、前記側板部
分６ａ，６ａには、前記凹所１７，１７に連なる
傾斜カム部６ｂ，６ｂが形成されており、アーム
９，９の自由端に形成した摘み９ｂ，９ｂあるい
は横軸１３の中間部を持つて、アーム９，９を第
５図の左方向に揺動させるだけで、第８図に示す
ように、横軸１３がカム部６ｂ，６ｂに案内され
て、凹所１７，１７に落ち込むように構成されて
いる。従つて、例えば紙詰まりなどのトラブルが
発生した場合には、熱定着装置Ａを複写機本体１
から抜き取つて、アーム９，９を第５図に仮想線
で示すように揺動させることにより、上部カバー
６を、同じく仮想線で示すように、上部ローラ２
ごと上方へ揺動開放することができ、紙の除去操
作などを容易に行うことができる。 On the other hand, the left and right side plate portions 6a of the upper cover 6,
6a, recesses 17, 17 are formed above the support shafts 10, 10, and these recesses 17,
17, the upper and lower covers 6 and 7 are connected to the closed position shown by solid lines in FIG. 5, and in this state, the upper and lower heat fixing rollers 2 and 3 are connected The upper and lower rollers 2 and 3 are brought into pressure contact with each other, and thermal expansion of the upper and lower rollers 2 and 3 can be absorbed by upward displacement of the upper cover 6 against the urging force of the springs 15 and 15. . Further, the side plate portions 6a, 6a are formed with inclined cam portions 6b, 6b connected to the recesses 17, 17, and the knobs 9b, 9b formed at the free ends of the arms 9, 9 or the horizontal shaft 13 are formed on the side plate portions 6a, 6a. By simply holding the intermediate portion and swinging the arms 9, 9 to the left in FIG. 5, the horizontal shaft 13 is guided by the cam portions 6b, 6b, and the recesses 17, 9 are moved, as shown in FIG. It is configured to drop to 17. Therefore, if a problem such as a paper jam occurs, the heat fixing device A can be removed from the copying machine main body 1.
By pulling out the upper cover 6 from the upper roller 2 and swinging the arms 9, 9 as shown in phantom lines in FIG.
It can be swung upwards and opened, making it easy to remove paper.
なお、前記第３図中の１８は、熱定着装置Ａを
複写機本体１に対して挿抜する際に用いられる把
手であつて、下部カバー７の片側の側板部分７ａ
に突設されている。また、１９は、複写機本体１
から抜き取つた熱定着装置Ａを持ち運ぶ際に用い
られるクランク状の把手であつて、その一端側が
上部カバー６の上面に回動自在に枢支されてい
て、把手１９の使用時には、その枢支軸心周りに
回動して把手１９の他端側を起立させ、不使用時
には、第３図に示している状態に倒伏させるよう
に構成されている。 Note that 18 in FIG. 3 is a handle used when inserting and removing the heat fixing device A from the copying machine main body 1, and is attached to the side plate portion 7a on one side of the lower cover 7.
It is installed protrudingly. In addition, 19 is the copying machine main body 1
It is a crank-shaped handle that is used when carrying the heat fixing device A that has been extracted from the machine, and one end of the handle is rotatably supported on the upper surface of the upper cover 6, and when the handle 19 is used, the The other end of the handle 19 is rotated around the axis to stand up, and when not in use, is folded down to the state shown in FIG. 3.
また、図示はしていないが、下部カバー７の下
面には凹部が形成されていて、複写機本体１側に
はその凹部に対して係脱自在はストツパーが枢設
されている。そして、熱定着装置Ａを複写機本体
１から適当量引き出すことによつて、前記ストツ
パーが前記凹部に自動的に係合して、熱定着装置
Ａの不測の抜け落ちを防止し、更に、その状態で
前記ストツパーを人為的に揺動操作して、前記凹
部との係合を解除させることにより、熱定着装置
Ａの全体を複写機本体１から抜き取れるように構
成されている。 Although not shown, a recess is formed on the lower surface of the lower cover 7, and a stopper is pivotally mounted on the copying machine main body 1 side to be able to engage and detach from the recess. By pulling out an appropriate amount of the heat fixing device A from the copying machine main body 1, the stopper automatically engages with the recess to prevent the heat fixing device A from accidentally coming off, and The entire thermal fixing device A can be removed from the copying machine main body 1 by manually swinging the stopper to release the engagement with the recess.
次に、前記熱定着装置Ａにおける各種伝動機構
について説明する。 Next, various transmission mechanisms in the heat fixing device A will be explained.
即ち、第４図に示すように、前記熱定着用上部
ローラ２の長手方向一端側に、前記複写機本体１
側の定位置駆動回転ギアGAに間接的に対応する
従動回転ギアGPが設けられると共に、前記従動
回転ギアGPには常時咬合していて、かつ、熱定
着装置Ａを複写機本体１に装着したときに前記複
写機本体１側の前記定位置駆動回転ギアGAに咬
合させられることにより、その駆動回転ギアGA
の回転を前記従動回転ギアGPに間接的に伝達す
るように構成された中間ギアGMを、その回転中
心PMが前記複写機本体１側の定位置駆動回転ギ
アGAの回転中心PAと前記上・下部カバーの枢支
軸８の軸心Ｐとを結ぶ線Ｌ上またはその付近に位
置する状態に、前記上部カバー６に支承させて設
けられている。 That is, as shown in FIG.
A driven rotary gear GP is provided which indirectly corresponds to the fixed position driving rotary gear G A on the side, and is always engaged with the driven rotary gear GP , and the heat fixing device A is connected to the copying machine main body 1. When mounted on the copying machine main body 1 side, the drive rotation gear G A is engaged with the fixed position drive rotation gear G A on the side of the copying machine main body 1.
The rotation center P M of the intermediate gear G M is configured to indirectly transmit the rotation of the driven rotation gear G P to the driven rotation gear G P, and its rotation center P M is the rotation center P of the fixed position driving rotation gear G A on the copying machine main body 1 side. It is supported by the upper cover 6 and positioned on or near a line L connecting A and the axis P of the pivot shaft 8 of the upper and lower covers.
また、その上部カバー６には、前記下側の非紙
用ローラ５を駆動するためにその長手方向一端側
に設けられたギアG1へ前記従動回転ギアGPの回
転を伝達するギアG2，G3や、前記熱定着用上部
ローラ２の表面に接触する状態に配設されている
シリコン塗布用ローラ（無数の細孔が形成された
シリコンオイル充填用のアルミ筒に多孔質性のシ
ートを巻き付けると共にその上面にフエルトを巻
き付けて成る）２０の長手方向一端側に設けられ
たギアG4へ前記中間ギアGMの回転を伝達するギ
アG5，G6も支承されており、かつ、前記上部ロ
ーラ２と順方向に回転するシリコン塗布用ローラ
２０の周速度は、前記熱定着用上部ローラ２の周
速度よりも若干大きく、しかも、ギアG5による
回転力でローラ２側に押さえ付け状態で回転する
ように設定されており、単なるシリコン塗布機能
のみならず、上部ローラ２の表面に対するクリー
ニング機能をも発揮し得るように構成されてい
る。 Further, on the upper cover 6, there is a gear G2 that transmits the rotation of the driven rotary gear GP to a gear G1 provided at one end in the longitudinal direction to drive the lower non-paper roller 5. . gears G 5 and G 6 for transmitting the rotation of the intermediate gear GM to the gear G 4 provided at one end in the longitudinal direction of the intermediate gear G 20 (which is formed by wrapping the intermediate gear G M and wrapping felt around the upper surface thereof) are also supported, and The circumferential speed of the silicon coating roller 20, which rotates in the forward direction of the upper roller 2, is slightly higher than the circumferential speed of the heat fixing upper roller 2, and is pressed against the roller 2 side by the rotational force of the gear G5. The upper roller 2 is configured to rotate in the same state, and is configured to perform not only a simple silicon coating function but also a cleaning function for the surface of the upper roller 2.
尚、前記ギアGMとギアG6とは同軸に固着され
ており、また、前記ギアGAにはスプロケツトホ
イール２１が一体化されていて、このホイール２
１に伝動チエーン２２が巻回されている。 Incidentally, the gear G M and the gear G 6 are coaxially fixed, and a sprocket wheel 21 is integrated with the gear G A , and this wheel 2
A transmission chain 22 is wound around 1.
以上述詳したところから明らかなように、本発
明に係る静電写真複写機の着脱式熱定着装置によ
れば、複写機本体側の定位置駆動回転ギアの回転
を熱定着装置側の熱定着用上部ローラが備えてい
る従動回転ギアに間接的に伝達するための中間ギ
アを、その回転中心が前記本体側の定位置駆動回
転ギアの回転中心と前記上・下部カバーの枢支軸
の軸心とを結ぶ線上またはその付近に位置する状
態に、前記上部カバーに支承させて設ける、とい
う極く簡素で安価で済む構造改良を施すのみであ
りながら、複写機本体への前記駆動回転ギアの組
み付けに際しては、従来のような面倒な格別の調
整を行う必要を無くすことができ、しかも、着脱
式熱定着装置の熱定着用上・下部ローラを常に円
滑な回転駆動状態に維持させ得ると共に、その定
着装置の複写機本体への着脱も常に支障無くスム
ーズに行なうことができる、という優れた効果が
発揮されるに至つた。
As is clear from the detailed description above, according to the removable heat fixing device for an electrostatographic copying machine according to the present invention, the rotation of the fixed position drive rotary gear on the copying machine main body side is controlled by the heat fixing device on the heat fixing device side. An intermediate gear for indirectly transmitting data to a driven rotating gear provided on the upper roller for use, the center of rotation of which is the center of rotation of the fixed position drive rotating gear on the main body side and the axis of the pivot shaft of the upper and lower covers. The drive rotary gear is connected to the main body of the copying machine by simply making an extremely simple and inexpensive structural improvement of supporting the upper cover on or near the line connecting the main body of the copying machine. When assembling, it is possible to eliminate the need for troublesome special adjustments as in the past, and to maintain the upper and lower heat fixing rollers of the removable heat fixing device in a smooth rotating state at all times. An excellent effect has been achieved in that the fixing device can always be smoothly attached and detached from the copying machine main body without any trouble.
第１図は本考案に係る静電写真複写機の着脱式
熱定着装置の作用を説明するための要部の概略側
面図を示す。また、第２図ないし第８図は本考案
を適用した静電写真複写機具体的実施例を示し、
第２図イは複写機の全体斜視図、第２図ロはその
要部の全体概略側面図、第３図は着脱式熱定着装
置の斜視図、第４図はその縦断正面図、第５図は
その正面図、第６図は第５図の右側面図、第７図
は付勢力付与構成の分解斜視図、第８図はその動
作の説明図である。そして、第９図は本考案の技
術的背景ならびに従来技術を説明するために用い
る従来構成の着脱式熱定着装置の縦断正面図を示
している。
１……静電写真複写機本体、２……熱定着用上
部ローラ、３……熱定着用下部ローラ、６……上
部カバー、７……下部カバー、８……枢支軸、１
５……スプリング、GA……定位置駆動回転ギア、
GP……従動回転ギア、GM……中間ギア、PM……
中間ギアGMの回転中心、PA……駆動回転ギアGA
の回転中心、Ｐ……枢支軸８の軸心。
FIG. 1 is a schematic side view of the main parts for explaining the operation of a removable heat fixing device for an electrostatographic copying machine according to the present invention. Further, FIGS. 2 to 8 show specific embodiments of an electrostatographic copying machine to which the present invention is applied,
FIG. 2A is an overall perspective view of the copying machine, FIG. 2B is an overall schematic side view of its main parts, FIG. 6 is a right side view of FIG. 5, FIG. 7 is an exploded perspective view of the biasing force applying structure, and FIG. 8 is an explanatory diagram of its operation. FIG. 9 shows a longitudinal sectional front view of a conventionally configured removable heat fixing device used to explain the technical background of the present invention and the prior art. DESCRIPTION OF SYMBOLS 1... Electrostatographic copying machine main body, 2... Upper roller for heat fixing, 3... Lower roller for heat fixing, 6... Upper cover, 7... Lower cover, 8... Pivot shaft, 1
5... Spring, G A ... Fixed position drive rotating gear,
G P ...Followed rotating gear, G M ...Intermediate gear, P M ...
Center of rotation of intermediate gear G M , P A ... Drive rotating gear G A
The rotation center of P...the axis of the pivot shaft 8.
Claims (1)
複写機本体側の定位置駆動回転ギアの下方に位置
してその駆動回転ギアにより回転させられる従動
回転ギアを長手方向一端側に備えた熱定着用の上
部ローラを上部カバーに架設し、当該上部カバー
を熱定着用の下部ローラが架設されている下部カ
バーに、それらの前後方向一端側に配置された前
記上・下部ローラと平行な枢支軸周りで揺動開閉
自在に枢着すると共に、前記上部カバーを閉じ姿
勢とした状態において前記上・下部カバー間に設
けたスプリングの付勢力で前記熱定着用上・下部
ローラ同士を互いに圧接させ、それら上・下部ロ
ーラの熱膨張を前記上部カバーの前記スプリング
の付勢力に抗しての上方への変位により吸収する
ように構成してある静電写真複写機の着脱式熱定
着装置であつて、 前記静電写真複写機本体側の定位置駆動回転ギ
アの回転を前記熱定着用上部ローラが備えている
従動回転ギアに間接的に伝達するための中間ギア
を、その回転中心が前記複写機本体側の定位置駆
動回転ギアの回転中心と前記上・下部カバーの枢
支軸の軸心とを結ぶ線上またはその付近に位置す
る状態に、前記上部カバーに支承させて設けてあ
ることを特徴とする静電写真複写機の着脱式熱定
着装置。[Scope of Claim for Utility Model Registration] A driven rotary gear located below a fixed position driving rotary gear on the side of the electrophotographic copying machine body and rotated by the drive rotary gear in the longitudinal direction when installed in the electrophotographic copying machine body. An upper roller for heat fixing provided on one end side is installed on the upper cover, and the upper cover is connected to the lower cover on which the lower roller for heat fixing is installed, and the upper roller provided on one end side in the front and back direction is connected to the upper cover. The upper and lower heat fixing rollers are pivotally connected to be able to swing open and close around a pivot shaft parallel to the lower roller, and when the upper cover is in the closed position, the upper and lower heat fixing rollers are biased by the biasing force of a spring provided between the upper and lower covers. An electrophotographic copying machine, wherein the lower rollers are brought into pressure contact with each other, and the thermal expansion of the upper and lower rollers is absorbed by upward displacement of the upper cover against the biasing force of the spring. The removable heat fixing device includes an intermediate gear for indirectly transmitting the rotation of the fixed position driving rotary gear on the main body side of the electrophotographic copying machine to the driven rotary gear provided on the upper heat fixing roller. , is supported on the upper cover such that its rotation center is located on or near a line connecting the rotation center of the fixed position drive rotary gear on the copying machine main body side and the axis of the pivot shaft of the upper and lower covers. 1. A removable heat fixing device for an electrostatographic copying machine, characterized in that the heat fixing device is provided with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3932785U JPH0434533Y2 (en) | 1985-03-18 | 1985-03-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3932785U JPH0434533Y2 (en) | 1985-03-18 | 1985-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61155861U JPS61155861U (en) | 1986-09-27 |
| JPH0434533Y2 true JPH0434533Y2 (en) | 1992-08-17 |
Family
ID=30547177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3932785U Expired JPH0434533Y2 (en) | 1985-03-18 | 1985-03-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0434533Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0789258B2 (en) * | 1987-11-12 | 1995-09-27 | コニカ株式会社 | Fixing device |
| JP2750121B2 (en) * | 1988-02-08 | 1998-05-13 | オリンパス光学工業株式会社 | Roller fixing device |
| JP5534425B2 (en) * | 2010-03-17 | 2014-07-02 | 富士ゼロックス株式会社 | Cover opening / closing mechanism and image forming apparatus |
-
1985
- 1985-03-18 JP JP3932785U patent/JPH0434533Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61155861U (en) | 1986-09-27 |
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